Lead author Karen Hardy, a Catalan Institute for Research and Advanced Studies (ICREA) Research Professor at the Universitat Autonoma de Barcelona (UAB) and an Honorary Research Associate at the University of York, said that purple nut sedge
is today considered to be a scourge in tropical and sub-tropical regions and has been called the world's most expensive weed due to the difficulties and high costs of eradication from agricultural areas.
Long-scaled or false nut sedge
, straw-colored flatsedge; Western old-field; Abundant and widespread in this field; C = 0; BSUH 17884.
False Nut Sedge
, Longscaled Nut Sedge
, Straw-colored Flat Sedge; Wet meadow north of central mesic woods and sedge meadows; Frequent to common in wet meadow but only infrequent in sedge meadows; C = 0; BSUH 13780.
Also known as yellow nut sedge
(Cyperus esculentus), nutgrass is a relative of papyrus (Cyperus papyrifera) and umbrella plant (Cyperus alternifolius), both of which are moisture loving plants, the latter often found in backyard water ponds.
Field Nut Sedge
, Yellow Nut Sedge
; Chufa Flat Sedge; Around Scott Pond; Infrequent; (#); C = 0; BSUH 11772, 11970.
Still, better to be invaded by red valerian than some weeds you might know - such as oxalis, field bindweed or yellow nut sedge